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<li data-ice="doc"><a data-ice="dirPath" class="nav-dir-path" href="identifiers.html#viewer">viewer</a><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/Configs.js~Configs.html">Configs</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/Plugin.js~Plugin.html">Plugin</a></span></span></li>
<li data-ice="doc"><a data-ice="dirPath" class="nav-dir-path" href="identifiers.html#viewer-localization">viewer/localization</a><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/localization/LocaleService.js~LocaleService.html">LocaleService</a></span></span></li>
<li data-ice="doc"><a data-ice="dirPath" class="nav-dir-path" href="identifiers.html#viewer-metadata">viewer/metadata</a><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/metadata/MetaModel.js~MetaModel.html">MetaModel</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/metadata/MetaObject.js~MetaObject.html">MetaObject</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/metadata/MetaScene.js~MetaScene.html">MetaScene</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/metadata/Property.js~Property.html">Property</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/metadata/PropertySet.js~PropertySet.html">PropertySet</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-IFCObjectDefaultColors">IFCObjectDefaultColors</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-IFCObjectDefaults">IFCObjectDefaults</a></span></span></li>
<li data-ice="doc"><a data-ice="dirPath" class="nav-dir-path" href="identifiers.html#viewer-scene">viewer/scene</a><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/Component.js~Component.html">Component</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-interface">I</span><span data-ice="name"><span><a href="class/src/viewer/scene/Entity.js~Entity.html">Entity</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-stats">stats</a></span></span></li>
<li data-ice="doc"><a data-ice="dirPath" class="nav-dir-path" href="identifiers.html#viewer-scene-bitmap">viewer/scene/Bitmap</a><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/Bitmap/Bitmap.js~Bitmap.html">Bitmap</a></span></span></li>
<li data-ice="doc"><a data-ice="dirPath" class="nav-dir-path" href="identifiers.html#viewer-scene-imageplane">viewer/scene/ImagePlane</a><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/ImagePlane/ImagePlane.js~ImagePlane.html">ImagePlane</a></span></span></li>
<li data-ice="doc"><a data-ice="dirPath" class="nav-dir-path" href="identifiers.html#viewer-scene-lineset">viewer/scene/LineSet</a><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/LineSet/LineSet.js~LineSet.html">LineSet</a></span></span></li>
<li data-ice="doc"><a data-ice="dirPath" class="nav-dir-path" href="identifiers.html#viewer-scene-camera">viewer/scene/camera</a><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/camera/Camera.js~Camera.html">Camera</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/camera/CameraFlightAnimation.js~CameraFlightAnimation.html">CameraFlightAnimation</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/camera/CameraPath.js~CameraPath.html">CameraPath</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/camera/CameraPathAnimation.js~CameraPathAnimation.html">CameraPathAnimation</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/camera/CustomProjection.js~CustomProjection.html">CustomProjection</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/camera/Frustum.js~Frustum.html">Frustum</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/camera/Ortho.js~Ortho.html">Ortho</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/camera/Perspective.js~Perspective.html">Perspective</a></span></span></li>
<li data-ice="doc"><a data-ice="dirPath" class="nav-dir-path" href="identifiers.html#viewer-scene-canvas">viewer/scene/canvas</a><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/canvas/Canvas.js~Canvas.html">Canvas</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/canvas/Spinner.js~Spinner.html">Spinner</a></span></span></li>
<li data-ice="doc"><a data-ice="dirPath" class="nav-dir-path" href="identifiers.html#viewer-scene-constants">viewer/scene/constants</a><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-AlphaFormat">AlphaFormat</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-ByteType">ByteType</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-ClampToEdgeWrapping">ClampToEdgeWrapping</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-CompressedMediaType">CompressedMediaType</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-DepthFormat">DepthFormat</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-DepthStencilFormat">DepthStencilFormat</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-FloatType">FloatType</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-GIFMediaType">GIFMediaType</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-HalfFloatType">HalfFloatType</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-IntType">IntType</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-JPEGMediaType">JPEGMediaType</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-LinearEncoding">LinearEncoding</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-LinearFilter">LinearFilter</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-LinearMipMapLinearFilter">LinearMipMapLinearFilter</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-LinearMipMapNearestFilter">LinearMipMapNearestFilter</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-LinearMipmapLinearFilter">LinearMipmapLinearFilter</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-LinearMipmapNearestFilter">LinearMipmapNearestFilter</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-LuminanceAlphaFormat">LuminanceAlphaFormat</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-LuminanceFormat">LuminanceFormat</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-MirroredRepeatWrapping">MirroredRepeatWrapping</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-NearestFilter">NearestFilter</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-NearestMipMapLinearFilter">NearestMipMapLinearFilter</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-NearestMipMapNearestFilter">NearestMipMapNearestFilter</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-NearestMipmapLinearFilter">NearestMipmapLinearFilter</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-NearestMipmapNearestFilter">NearestMipmapNearestFilter</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-PNGMediaType">PNGMediaType</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBAFormat">RGBAFormat</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBAIntegerFormat">RGBAIntegerFormat</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_10x10_Format">RGBA_ASTC_10x10_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_10x5_Format">RGBA_ASTC_10x5_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_10x6_Format">RGBA_ASTC_10x6_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_10x8_Format">RGBA_ASTC_10x8_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_12x10_Format">RGBA_ASTC_12x10_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_12x12_Format">RGBA_ASTC_12x12_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_4x4_Format">RGBA_ASTC_4x4_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_5x4_Format">RGBA_ASTC_5x4_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_5x5_Format">RGBA_ASTC_5x5_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_6x5_Format">RGBA_ASTC_6x5_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_6x6_Format">RGBA_ASTC_6x6_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_8x5_Format">RGBA_ASTC_8x5_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_8x6_Format">RGBA_ASTC_8x6_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ASTC_8x8_Format">RGBA_ASTC_8x8_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_BPTC_Format">RGBA_BPTC_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_ETC2_EAC_Format">RGBA_ETC2_EAC_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_PVRTC_2BPPV1_Format">RGBA_PVRTC_2BPPV1_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_PVRTC_4BPPV1_Format">RGBA_PVRTC_4BPPV1_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_S3TC_DXT1_Format">RGBA_S3TC_DXT1_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_S3TC_DXT3_Format">RGBA_S3TC_DXT3_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBA_S3TC_DXT5_Format">RGBA_S3TC_DXT5_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGBFormat">RGBFormat</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGB_ETC1_Format">RGB_ETC1_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGB_ETC2_Format">RGB_ETC2_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGB_PVRTC_2BPPV1_Format">RGB_PVRTC_2BPPV1_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGB_PVRTC_4BPPV1_Format">RGB_PVRTC_4BPPV1_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGB_S3TC_DXT1_Format">RGB_S3TC_DXT1_Format</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGFormat">RGFormat</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RGIntegerFormat">RGIntegerFormat</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RedFormat">RedFormat</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RedIntegerFormat">RedIntegerFormat</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-RepeatWrapping">RepeatWrapping</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-ShortType">ShortType</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-UnsignedByteType">UnsignedByteType</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-UnsignedInt248Type">UnsignedInt248Type</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-UnsignedIntType">UnsignedIntType</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-UnsignedShort4444Type">UnsignedShort4444Type</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-UnsignedShort5551Type">UnsignedShort5551Type</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-UnsignedShortType">UnsignedShortType</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-sRGBEncoding">sRGBEncoding</a></span></span></li>
<li data-ice="doc"><a data-ice="dirPath" class="nav-dir-path" href="identifiers.html#viewer-scene-geometry">viewer/scene/geometry</a><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/geometry/Geometry.js~Geometry.html">Geometry</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/geometry/ReadableGeometry.js~ReadableGeometry.html">ReadableGeometry</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-class">C</span><span data-ice="name"><span><a href="class/src/viewer/scene/geometry/VBOGeometry.js~VBOGeometry.html">VBOGeometry</a></span></span></li>
<li data-ice="doc"><a data-ice="dirPath" class="nav-dir-path" href="identifiers.html#viewer-scene-geometry-builders">viewer/scene/geometry/builders</a><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-buildBoxGeometry">buildBoxGeometry</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-buildBoxLinesGeometry">buildBoxLinesGeometry</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-buildBoxLinesGeometryFromAABB">buildBoxLinesGeometryFromAABB</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-buildCylinderGeometry">buildCylinderGeometry</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-buildGridGeometry">buildGridGeometry</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-buildLineGeometry">buildLineGeometry</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-buildPlaneGeometry">buildPlaneGeometry</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-buildPolylineGeometry">buildPolylineGeometry</a></span></span></li>
<li data-ice="doc"><span data-ice="kind" class="kind-function">F</span><span data-ice="name"><span><a href="function/index.html#static-function-buildPolylineGeometryFromCurve">buildPolylineGeometryFromCurve</a></span></span></li>
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<div class="content" data-ice="content"><h1 data-ice="title">src/viewer/scene/model/vbo/batching/triangles/VBOBatchingTrianglesLayer.js</h1>
<pre class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">import {ENTITY_FLAGS} from &apos;../../../ENTITY_FLAGS.js&apos;;
import {RENDER_PASSES} from &apos;../../../RENDER_PASSES.js&apos;;

import {math} from &quot;../../../../math/math.js&quot;;
import {RenderState} from &quot;../../../../webgl/RenderState.js&quot;;
import {ArrayBuf} from &quot;../../../../webgl/ArrayBuf.js&quot;;
import {geometryCompressionUtils} from &quot;../../../../math/geometryCompressionUtils.js&quot;;
import {getRenderers} from &quot;./renderers/Renderers.js&quot;;
import {VBOBatchingTrianglesBuffer} from &quot;./VBOBatchingTrianglesBuffer.js&quot;;
import {quantizePositions, transformAndOctEncodeNormals} from &quot;../../../compression.js&quot;;

const tempMat4 = math.mat4();
const tempMat4b = math.mat4();
const tempVec4a = math.vec4([0, 0, 0, 1]);

const tempVec3a = math.vec3();
const tempVec3b = math.vec3();
const tempVec3c = math.vec3();
const tempVec3d = math.vec3();
const tempVec3e = math.vec3();
const tempVec3f = math.vec3();
const tempVec3g = math.vec3();

/**
 * @private
 */
export class VBOBatchingTrianglesLayer {

    /**
     * @param model
     * @param cfg.model
     * @param cfg.autoNormals
     * @param cfg.layerIndex
     * @param cfg.positionsDecodeMatrix
     * @param cfg.uvDecodeMatrix
     * @param cfg.maxGeometryBatchSize
     * @param cfg.origin
     * @param cfg.scratchMemory
     * @param cfg.textureSet
     * @param cfg.solid
     */
    constructor(cfg) {

     //   console.info(&quot;Creating VBOBatchingTrianglesLayer&quot;);

        /**
         * Owner model
         * @type {VBOSceneModel}
         */
        this.model = cfg.model;

        /**
         * State sorting key.
         * @type {string}
         */
        this.sortId = &quot;TrianglesBatchingLayer&quot;
            + (cfg.solid ? &quot;-solid&quot; : &quot;-surface&quot;)
            + (cfg.autoNormals ? &quot;-autonormals&quot; : &quot;-normals&quot;)

            // TODO: These two parts need to be IDs (ie. unique):

            + (cfg.textureSet &amp;&amp; cfg.textureSet.colorTexture ? &quot;-colorTexture&quot; : &quot;&quot;)
            + (cfg.textureSet &amp;&amp; cfg.textureSet.metallicRoughnessTexture ? &quot;-metallicRoughnessTexture&quot; : &quot;&quot;);

        /**
         * Index of this TrianglesBatchingLayer in {@link VBOSceneModel#_layerList}.
         * @type {Number}
         */
        this.layerIndex = cfg.layerIndex;

        this._renderers = getRenderers(cfg.model.scene);
        this._buffer = new VBOBatchingTrianglesBuffer(cfg.maxGeometryBatchSize);
        this._scratchMemory = cfg.scratchMemory;

        this._state = new RenderState({
            origin: math.vec3(),
            positionsBuf: null,
            offsetsBuf: null,
            normalsBuf: null,
            colorsBuf: null,
            uvBuf: null,
            metallicRoughnessBuf: null,
            flagsBuf: null,
            indicesBuf: null,
            edgeIndicesBuf: null,
            positionsDecodeMatrix: null,
            uvDecodeMatrix: null,
            textureSet: cfg.textureSet,
            pbrSupported: false // Set in #finalize if we have enough to support quality rendering
        });

        // These counts are used to avoid unnecessary render passes
        this._numPortions = 0;
        this._numVisibleLayerPortions = 0;
        this._numTransparentLayerPortions = 0;
        this._numXRayedLayerPortions = 0;
        this._numSelectedLayerPortions = 0;
        this._numHighlightedLayerPortions = 0;
        this._numClippableLayerPortions = 0;
        this._numEdgesLayerPortions = 0;
        this._numPickableLayerPortions = 0;
        this._numCulledLayerPortions = 0;

        this._modelAABB = math.collapseAABB3(); // Model-space AABB
        this._portions = [];
        this._meshes = [];
        this._numVerts = 0;

        this._aabb = math.collapseAABB3();
        this.aabbDirty = true;

        this._finalized = false;

        if (cfg.positionsDecodeMatrix) {
            this._state.positionsDecodeMatrix = math.mat4(cfg.positionsDecodeMatrix);
        }

        if (cfg.uvDecodeMatrix) {
            this._state.uvDecodeMatrix = math.mat3(cfg.uvDecodeMatrix);
            this._preCompressedUVsExpected = true;
        } else {
            this._preCompressedUVsExpected = false;
        }

        if (cfg.origin) {
            this._state.origin.set(cfg.origin);
        }

        /**
         * When true, this layer contains solid triangle meshes, otherwise this layer contains surface triangle meshes
         * @type {boolean}
         */
        this.solid = !!cfg.solid;

        /**
         * The type of primitives in this layer.
         */
        this.primitive = cfg.primitive;
    }

    get aabb() {
        if (this.aabbDirty) {
            math.collapseAABB3(this._aabb);
            for (let i = 0, len = this._meshes.length; i &lt; len; i++) {
                math.expandAABB3(this._aabb, this._meshes[i].aabb);
            }
            this.aabbDirty = false;
        }
        return this._aabb;
    }

    /**
     * Tests if there is room for another portion in this TrianglesBatchingLayer.
     *
     * @param lenPositions Number of positions we&apos;d like to create in the portion.
     * @param lenIndices Number of indices we&apos;d like to create in this portion.
     * @returns {Boolean} True if OK to create another portion.
     */
    canCreatePortion(lenPositions, lenIndices) {
        if (this._finalized) {
            throw &quot;Already finalized&quot;;
        }
        return ((this._buffer.positions.length + lenPositions) &lt; (this._buffer.maxVerts * 3) &amp;&amp; (this._buffer.indices.length + lenIndices) &lt; (this._buffer.maxIndices));
    }

    /**
     * Creates a new portion within this TrianglesBatchingLayer, returns the new portion ID.
     *
     * Gives the portion the specified geometry, color and matrix.
     *
     * @param mesh The SceneModelMesh that owns the portion
     * @param cfg.positions Flat float Local-space positions array.
     * @param cfg.positionsCompressed Flat quantized positions array - decompressed with TrianglesBatchingLayer positionsDecodeMatrix
     * @param [cfg.normals] Flat float normals array.
     * @param [cfg.uv] Flat UVs array.
     * @param [cfg.uvCompressed]
     * @param [cfg.colors] Flat float colors array.
     * @param [cfg.colorsCompressed]
     * @param cfg.indices  Flat int indices array.
     * @param [cfg.edgeIndices] Flat int edges indices array.
     * @param cfg.color Quantized RGB color [0..255,0..255,0..255,0..255]
     * @param cfg.metallic Metalness factor [0..255]
     * @param cfg.roughness Roughness factor [0..255]
     * @param cfg.opacity Opacity [0..255]
     * @param [cfg.meshMatrix] Flat float 4x4 matrix
     * @param cfg.aabb Flat float AABB World-space AABB
     * @param cfg.pickColor Quantized pick color
     * @returns {number} Portion ID
     */
    createPortion(mesh, cfg) {

        if (this._finalized) {
            throw &quot;Already finalized&quot;;
        }

        const positions = cfg.positions;
        const positionsCompressed = cfg.positionsCompressed;
        const normals = cfg.normals;
        const normalsCompressed = cfg.normalsCompressed;
        const uv = cfg.uv;
        const uvCompressed = cfg.uvCompressed;
        const colors = cfg.colors;
        const colorsCompressed = cfg.colorsCompressed;
        const indices = cfg.indices;
        const edgeIndices = cfg.edgeIndices;
        const color = cfg.color;
        const metallic = cfg.metallic;
        const roughness = cfg.roughness;
        const opacity = cfg.opacity;
        const meshMatrix = cfg.meshMatrix;
        const pickColor = cfg.pickColor;

        const scene = this.model.scene;
        const buffer = this._buffer;
        const vertsBaseIndex = buffer.positions.length / 3;

        let numVerts;

        math.expandAABB3(this._modelAABB, cfg.aabb);

        if (this._state.positionsDecodeMatrix) {
            if (!positionsCompressed) {
                throw &quot;positionsCompressed expected&quot;;
            }
            numVerts = positionsCompressed.length / 3;
            for (let i = 0, len = positionsCompressed.length; i &lt; len; i++) {
                buffer.positions.push(positionsCompressed[i]);
            }
        } else {
            if (!positions) {
                throw &quot;positions expected&quot;;
            }
            numVerts = positions.length / 3;
            for (let i = 0, len = positions.length; i &lt; len; i++) {
                buffer.positions.push(positions[i]);
            }
        }

        if (normalsCompressed &amp;&amp; normalsCompressed.length &gt; 0) {
            for (let i = 0, len = normalsCompressed.length; i &lt; len; i++) {
                buffer.normals.push(normalsCompressed[i]);
            }
        } else if (normals &amp;&amp; normals.length &gt; 0) {
            const worldNormalMatrix = tempMat4;
            if (meshMatrix) {
                math.inverseMat4(math.transposeMat4(meshMatrix, tempMat4b), worldNormalMatrix); // Note: order of inverse and transpose doesn&apos;t matter
            } else {
                math.identityMat4(worldNormalMatrix, worldNormalMatrix);
            }
            transformAndOctEncodeNormals(worldNormalMatrix, normals, normals.length, buffer.normals, buffer.normals.length);
        }

        if (colors) {
            for (let i = 0, len = colors.length; i &lt; len; i += 3) {
                buffer.colors.push(colors[i] * 255);
                buffer.colors.push(colors[i + 1] * 255);
                buffer.colors.push(colors[i + 2] * 255);
                buffer.colors.push(255);
            }
        } else if (colorsCompressed) {
            for (let i = 0, len = colors.length; i &lt; len; i += 3) {
                buffer.colors.push(colors[i]);
                buffer.colors.push(colors[i + 1]);
                buffer.colors.push(colors[i + 2]);
                buffer.colors.push(255);
            }
        } else if (color) {
            const r = color[0]; // Color is pre-quantized by VBOSceneModel
            const g = color[1];
            const b = color[2];
            const a = opacity;
            for (let i = 0; i &lt; numVerts; i++) {
                buffer.colors.push(r);
                buffer.colors.push(g);
                buffer.colors.push(b);
                buffer.colors.push(a);
            }
        }
        const metallicValue = (metallic !== null &amp;&amp; metallic !== undefined) ? metallic : 0;
        const roughnessValue = (roughness !== null &amp;&amp; roughness !== undefined) ? roughness : 255;
        for (let i = 0; i &lt; numVerts; i++) {
            buffer.metallicRoughness.push(metallicValue);
            buffer.metallicRoughness.push(roughnessValue);
        }

        if (uv &amp;&amp; uv.length &gt; 0) {
            for (let i = 0, len = uv.length; i &lt; len; i++) {
                buffer.uv.push(uv[i]);
            }
        } else if (uvCompressed &amp;&amp; uvCompressed.length &gt; 0) {
            for (let i = 0, len = uvCompressed.length; i &lt; len; i++) {
                buffer.uv.push(uvCompressed[i]);
            }
        }

        for (let i = 0, len = indices.length; i &lt; len; i++) {
            buffer.indices.push(vertsBaseIndex + indices[i]);
        }


        if (edgeIndices) {
            for (let i = 0, len = edgeIndices.length; i &lt; len; i++) {
                buffer.edgeIndices.push(vertsBaseIndex + edgeIndices[i]);
            }
        }

        {
            const pickColorsBase = buffer.pickColors.length;
            const lenPickColors = numVerts * 4;
            for (let i = pickColorsBase, len = pickColorsBase + lenPickColors; i &lt; len; i += 4) {
                buffer.pickColors.push(pickColor[0]);
                buffer.pickColors.push(pickColor[1]);
                buffer.pickColors.push(pickColor[2]);
                buffer.pickColors.push(pickColor[3]);
            }
        }

        if (scene.entityOffsetsEnabled) {
            for (let i = 0; i &lt; numVerts; i++) {
                buffer.offsets.push(0);
                buffer.offsets.push(0);
                buffer.offsets.push(0);
            }
        }

        const portionId = this._portions.length;

        const portion = {
            vertsBaseIndex: vertsBaseIndex,
            numVerts: numVerts,
            indicesBaseIndex: buffer.indices.length - indices.length,
            numIndices: indices.length,
        };

        if (scene.readableGeometryEnabled) {
            // Quantized in-memory positions are initialized in finalize()

            portion.indices = indices;

            if (scene.entityOffsetsEnabled) {
                portion.offset = new Float32Array(3);
            }
        }

        this._portions.push(portion);
        this._numPortions++;
        this.model.numPortions++;
        this._numVerts += portion.numVerts;
        this._meshes.push(mesh);
        return portionId;
    }

    /**
     * Builds batch VBOs from appended geometries.
     * No more portions can then be created.
     */
    finalize() {

        if (this._finalized) {
            return;
        }

        const state = this._state;
        const gl = this.model.scene.canvas.gl;
        const buffer = this._buffer;

        if (buffer.positions.length &gt; 0) {
            const quantizedPositions = (this._state.positionsDecodeMatrix)
                ? new Uint16Array(buffer.positions)
                : quantizePositions(buffer.positions, this._modelAABB, this._state.positionsDecodeMatrix = math.mat4()); // BOTTLENECK
            state.positionsBuf = new ArrayBuf(gl, gl.ARRAY_BUFFER, quantizedPositions, quantizedPositions.length, 3, gl.STATIC_DRAW);
            if (this.model.scene.readableGeometryEnabled) {
                for (let i = 0, numPortions = this._portions.length; i &lt; numPortions; i++) {
                    const portion = this._portions[i];
                    const start = portion.vertsBaseIndex * 3;
                    const end = start + (portion.numVerts * 3);
                    portion.quantizedPositions = quantizedPositions.slice(start, end);
                }
            }
        }

        if (buffer.normals.length &gt; 0) { // Normals are already oct-encoded
            const normals = new Int8Array(buffer.normals);
            let normalized = true; // For oct encoded UInts
            state.normalsBuf = new ArrayBuf(gl, gl.ARRAY_BUFFER, normals, buffer.normals.length, 3, gl.STATIC_DRAW, normalized);
        }

        if (buffer.colors.length &gt; 0) { // Colors are already compressed
            const colors = new Uint8Array(buffer.colors);
            let normalized = false;
            state.colorsBuf = new ArrayBuf(gl, gl.ARRAY_BUFFER, colors, buffer.colors.length, 4, gl.DYNAMIC_DRAW, normalized);
        }

        if (buffer.uv.length &gt; 0) {
            if (!state.uvDecodeMatrix) {
                const bounds = geometryCompressionUtils.getUVBounds(buffer.uv);
                const result = geometryCompressionUtils.compressUVs(buffer.uv, bounds.min, bounds.max);
                const uv = result.quantized;
                let notNormalized = false;
                state.uvDecodeMatrix = math.mat3(result.decodeMatrix);
                state.uvBuf = new ArrayBuf(gl, gl.ARRAY_BUFFER, uv, uv.length, 2, gl.STATIC_DRAW, notNormalized);
            } else {
                let notNormalized = false;
                state.uvBuf = new ArrayBuf(gl, gl.ARRAY_BUFFER, buffer.uv, buffer.uv.length, 2, gl.STATIC_DRAW, notNormalized);
            }
        }

        if (buffer.metallicRoughness.length &gt; 0) {
            const metallicRoughness = new Uint8Array(buffer.metallicRoughness);
            let normalized = false;
            state.metallicRoughnessBuf = new ArrayBuf(gl, gl.ARRAY_BUFFER, metallicRoughness, buffer.metallicRoughness.length, 2, gl.STATIC_DRAW, normalized);
        }

        if (buffer.positions.length &gt; 0) { // Because we build flags arrays here, get their length from the positions array
            const flagsLength = (buffer.positions.length / 3);
            const flags = new Float32Array(flagsLength);
            const notNormalized = false;
            state.flagsBuf = new ArrayBuf(gl, gl.ARRAY_BUFFER, flags, flags.length, 1, gl.DYNAMIC_DRAW, notNormalized);
        }

        if (buffer.pickColors.length &gt; 0) {
            const pickColors = new Uint8Array(buffer.pickColors);
            let normalized = false;
            state.pickColorsBuf = new ArrayBuf(gl, gl.ARRAY_BUFFER, pickColors, buffer.pickColors.length, 4, gl.STATIC_DRAW, normalized);
        }

        if (this.model.scene.entityOffsetsEnabled) {
            if (buffer.offsets.length &gt; 0) {
                const offsets = new Float32Array(buffer.offsets);
                state.offsetsBuf = new ArrayBuf(gl, gl.ARRAY_BUFFER, offsets, buffer.offsets.length, 3, gl.DYNAMIC_DRAW);
            }
        }

        if (buffer.indices.length &gt; 0) {
            const indices = new Uint32Array(buffer.indices);
            state.indicesBuf = new ArrayBuf(gl, gl.ELEMENT_ARRAY_BUFFER, indices, buffer.indices.length, 1, gl.STATIC_DRAW);
        }
        if (buffer.edgeIndices.length &gt; 0) {
            const edgeIndices = new Uint32Array(buffer.edgeIndices);
            state.edgeIndicesBuf = new ArrayBuf(gl, gl.ELEMENT_ARRAY_BUFFER, edgeIndices, buffer.edgeIndices.length, 1, gl.STATIC_DRAW);
        }

        this._state.pbrSupported
            = !!state.metallicRoughnessBuf
            &amp;&amp; !!state.uvBuf
            &amp;&amp; !!state.normalsBuf
            &amp;&amp; !!state.textureSet
            &amp;&amp; !!state.textureSet.colorTexture
            &amp;&amp; !!state.textureSet.metallicRoughnessTexture;

        this._state.colorTextureSupported
            = !!state.uvBuf
            &amp;&amp; !!state.textureSet
            &amp;&amp; !!state.textureSet.colorTexture;

        this._buffer = null;
        this._finalized = true;
    }

    isEmpty() {
        return (!this._state.indicesBuf);
    }

    initFlags(portionId, flags, meshTransparent) {
        if (flags &amp; ENTITY_FLAGS.VISIBLE) {
            this._numVisibleLayerPortions++;
            this.model.numVisibleLayerPortions++;
        }
        if (flags &amp; ENTITY_FLAGS.HIGHLIGHTED) {
            this._numHighlightedLayerPortions++;
            this.model.numHighlightedLayerPortions++;
        }
        if (flags &amp; ENTITY_FLAGS.XRAYED) {
            this._numXRayedLayerPortions++;
            this.model.numXRayedLayerPortions++;
        }
        if (flags &amp; ENTITY_FLAGS.SELECTED) {
            this._numSelectedLayerPortions++;
            this.model.numSelectedLayerPortions++;
        }
        if (flags &amp; ENTITY_FLAGS.CLIPPABLE) {
            this._numClippableLayerPortions++;
            this.model.numClippableLayerPortions++;
        }
        if (flags &amp; ENTITY_FLAGS.EDGES) {
            this._numEdgesLayerPortions++;
            this.model.numEdgesLayerPortions++;
        }
        if (flags &amp; ENTITY_FLAGS.PICKABLE) {
            this._numPickableLayerPortions++;
            this.model.numPickableLayerPortions++;
        }
        if (flags &amp; ENTITY_FLAGS.CULLED) {
            this._numCulledLayerPortions++;
            this.model.numCulledLayerPortions++;
        }
        if (meshTransparent) {
            this._numTransparentLayerPortions++;
            this.model.numTransparentLayerPortions++;
        }
        const deferred = true;
        this._setFlags(portionId, flags, meshTransparent, deferred);
    }

    flushInitFlags() {
        this._setDeferredFlags();
    }

    setVisible(portionId, flags, transparent) {
        if (!this._finalized) {
            throw &quot;Not finalized&quot;;
        }
        if (flags &amp; ENTITY_FLAGS.VISIBLE) {
            this._numVisibleLayerPortions++;
            this.model.numVisibleLayerPortions++;
        } else {
            this._numVisibleLayerPortions--;
            this.model.numVisibleLayerPortions--;
        }
        this._setFlags(portionId, flags, transparent);
    }

    setHighlighted(portionId, flags, transparent) {
        if (!this._finalized) {
            throw &quot;Not finalized&quot;;
        }
        if (flags &amp; ENTITY_FLAGS.HIGHLIGHTED) {
            this._numHighlightedLayerPortions++;
            this.model.numHighlightedLayerPortions++;
        } else {
            this._numHighlightedLayerPortions--;
            this.model.numHighlightedLayerPortions--;
        }
        this._setFlags(portionId, flags, transparent);
    }

    setXRayed(portionId, flags, transparent) {
        if (!this._finalized) {
            throw &quot;Not finalized&quot;;
        }
        if (flags &amp; ENTITY_FLAGS.XRAYED) {
            this._numXRayedLayerPortions++;
            this.model.numXRayedLayerPortions++;
        } else {
            this._numXRayedLayerPortions--;
            this.model.numXRayedLayerPortions--;
        }
        this._setFlags(portionId, flags, transparent);
    }

    setSelected(portionId, flags, transparent) {
        if (!this._finalized) {
            throw &quot;Not finalized&quot;;
        }
        if (flags &amp; ENTITY_FLAGS.SELECTED) {
            this._numSelectedLayerPortions++;
            this.model.numSelectedLayerPortions++;
        } else {
            this._numSelectedLayerPortions--;
            this.model.numSelectedLayerPortions--;
        }
        this._setFlags(portionId, flags, transparent);
    }

    setEdges(portionId, flags, transparent) {
        if (!this._finalized) {
            throw &quot;Not finalized&quot;;
        }
        if (flags &amp; ENTITY_FLAGS.EDGES) {
            this._numEdgesLayerPortions++;
            this.model.numEdgesLayerPortions++;
        } else {
            this._numEdgesLayerPortions--;
            this.model.numEdgesLayerPortions--;
        }
        this._setFlags(portionId, flags, transparent);
    }

    setClippable(portionId, flags) {
        if (!this._finalized) {
            throw &quot;Not finalized&quot;;
        }
        if (flags &amp; ENTITY_FLAGS.CLIPPABLE) {
            this._numClippableLayerPortions++;
            this.model.numClippableLayerPortions++;
        } else {
            this._numClippableLayerPortions--;
            this.model.numClippableLayerPortions--;
        }
        this._setFlags(portionId, flags);
    }

    setCulled(portionId, flags, transparent) {
        if (!this._finalized) {
            throw &quot;Not finalized&quot;;
        }
        if (flags &amp; ENTITY_FLAGS.CULLED) {
            this._numCulledLayerPortions++;
            this.model.numCulledLayerPortions++;
        } else {
            this._numCulledLayerPortions--;
            this.model.numCulledLayerPortions--;
        }
        this._setFlags(portionId, flags, transparent);
    }

    setCollidable(portionId, flags) {
        if (!this._finalized) {
            throw &quot;Not finalized&quot;;
        }
    }

    setPickable(portionId, flags, transparent) {
        if (!this._finalized) {
            throw &quot;Not finalized&quot;;
        }
        if (flags &amp; ENTITY_FLAGS.PICKABLE) {
            this._numPickableLayerPortions++;
            this.model.numPickableLayerPortions++;
        } else {
            this._numPickableLayerPortions--;
            this.model.numPickableLayerPortions--;
        }
        this._setFlags(portionId, flags, transparent);
    }

    setColor(portionId, color) {
        if (!this._finalized) {
            throw &quot;Not finalized&quot;;
        }
        const portionsIdx = portionId;
        const portion = this._portions[portionsIdx];
        const vertsBaseIndex = portion.vertsBaseIndex;
        const numVerts = portion.numVerts;
        const firstColor = vertsBaseIndex * 4;
        const lenColor = numVerts * 4;
        const tempArray = this._scratchMemory.getUInt8Array(lenColor);
        const r = color[0];
        const g = color[1];
        const b = color[2];
        const a = color[3];
        for (let i = 0; i &lt; lenColor; i += 4) {
            tempArray[i + 0] = r;
            tempArray[i + 1] = g;
            tempArray[i + 2] = b;
            tempArray[i + 3] = a;
        }
        if (this._state.colorsBuf) {
            this._state.colorsBuf.setData(tempArray, firstColor, lenColor);
        }
    }

    setTransparent(portionId, flags, transparent) {
        if (transparent) {
            this._numTransparentLayerPortions++;
            this.model.numTransparentLayerPortions++;
        } else {
            this._numTransparentLayerPortions--;
            this.model.numTransparentLayerPortions--;
        }
        this._setFlags(portionId, flags, transparent);
    }

    /**
     * flags are 4bits values encoded on a 32bit base. color flag on the first 4 bits, silhouette flag on the next 4 bits and so on for edge, pick and clippable.
     */
    _setFlags(portionId, flags, transparent, deferred = false) {

        if (!this._finalized) {
            throw &quot;Not finalized&quot;;
        }

        const portionsIdx = portionId;
        const portion = this._portions[portionsIdx];
        const vertsBaseIndex = portion.vertsBaseIndex;
        const numVerts = portion.numVerts;
        const firstFlag = vertsBaseIndex;
        const lenFlags = numVerts;

        const visible = !!(flags &amp; ENTITY_FLAGS.VISIBLE);
        const xrayed = !!(flags &amp; ENTITY_FLAGS.XRAYED);
        const highlighted = !!(flags &amp; ENTITY_FLAGS.HIGHLIGHTED);
        const selected = !!(flags &amp; ENTITY_FLAGS.SELECTED);
        const edges = !!(flags &amp; ENTITY_FLAGS.EDGES);
        const pickable = !!(flags &amp; ENTITY_FLAGS.PICKABLE);
        const culled = !!(flags &amp; ENTITY_FLAGS.CULLED);

        let colorFlag;
        if (!visible || culled || xrayed
            || (highlighted &amp;&amp; !this.model.scene.highlightMaterial.glowThrough)
            || (selected &amp;&amp; !this.model.scene.selectedMaterial.glowThrough)) {
            colorFlag = RENDER_PASSES.NOT_RENDERED;
        } else {
            if (transparent) {
                colorFlag = RENDER_PASSES.COLOR_TRANSPARENT;
            } else {
                colorFlag = RENDER_PASSES.COLOR_OPAQUE;
            }
        }

        let silhouetteFlag;
        if (!visible || culled) {
            silhouetteFlag = RENDER_PASSES.NOT_RENDERED;
        } else if (selected) {
            silhouetteFlag = RENDER_PASSES.SILHOUETTE_SELECTED;
        } else if (highlighted) {
            silhouetteFlag = RENDER_PASSES.SILHOUETTE_HIGHLIGHTED;
        } else if (xrayed) {
            silhouetteFlag = RENDER_PASSES.SILHOUETTE_XRAYED;
        } else {
            silhouetteFlag = RENDER_PASSES.NOT_RENDERED;
        }

        let edgeFlag = 0;
        if (!visible || culled) {
            edgeFlag = RENDER_PASSES.NOT_RENDERED;
        } else if (selected) {
            edgeFlag = RENDER_PASSES.EDGES_SELECTED;
        } else if (highlighted) {
            edgeFlag = RENDER_PASSES.EDGES_HIGHLIGHTED;
        } else if (xrayed) {
            edgeFlag = RENDER_PASSES.EDGES_XRAYED;
        } else if (edges) {
            if (transparent) {
                edgeFlag = RENDER_PASSES.EDGES_COLOR_TRANSPARENT;
            } else {
                edgeFlag = RENDER_PASSES.EDGES_COLOR_OPAQUE;
            }
        } else {
            edgeFlag = RENDER_PASSES.NOT_RENDERED;
        }

        let pickFlag = (visible &amp;&amp; !culled &amp;&amp; pickable) ? RENDER_PASSES.PICK : RENDER_PASSES.NOT_RENDERED;

        const clippableFlag = !!(flags &amp; ENTITY_FLAGS.CLIPPABLE) ? 1 : 0;

        if (deferred) {
            // Avoid zillions of individual WebGL bufferSubData calls - buffer them to apply in one shot
            if (!this._deferredFlagValues) {
                this._deferredFlagValues = new Float32Array(this._numVerts);
            }
            for (let i = firstFlag, len = (firstFlag + lenFlags); i &lt; len; i++) {
                let vertFlag = 0;
                vertFlag |= colorFlag;
                vertFlag |= silhouetteFlag &lt;&lt; 4;
                vertFlag |= edgeFlag &lt;&lt; 8;
                vertFlag |= pickFlag &lt;&lt; 12;
                vertFlag |= clippableFlag &lt;&lt; 16;

                this._deferredFlagValues[i] = vertFlag;
            }
        } else if (this._state.flagsBuf) {
            const tempArray = this._scratchMemory.getFloat32Array(lenFlags);
            for (let i = 0; i &lt; lenFlags; i++) {
                let vertFlag = 0;
                vertFlag |= colorFlag;
                vertFlag |= silhouetteFlag &lt;&lt; 4;
                vertFlag |= edgeFlag &lt;&lt; 8;
                vertFlag |= pickFlag &lt;&lt; 12;
                vertFlag |= clippableFlag &lt;&lt; 16;

                tempArray[i] = vertFlag;
            }
            this._state.flagsBuf.setData(tempArray, firstFlag, lenFlags);
        }
    }

    _setDeferredFlags() {
        if (this._deferredFlagValues) {
            this._state.flagsBuf.setData(this._deferredFlagValues);
            this._deferredFlagValues = null;
        }
    }

    setOffset(portionId, offset) {
        if (!this._finalized) {
            throw &quot;Not finalized&quot;;
        }
        if (!this.model.scene.entityOffsetsEnabled) {
            this.model.error(&quot;Entity#offset not enabled for this Viewer&quot;); // See Viewer entityOffsetsEnabled
            return;
        }
        const portionsIdx = portionId;
        const portion = this._portions[portionsIdx];
        const vertsBaseIndex = portion.vertsBaseIndex;
        const numVerts = portion.numVerts;
        const firstOffset = vertsBaseIndex * 3;
        const lenOffsets = numVerts * 3;
        const tempArray = this._scratchMemory.getFloat32Array(lenOffsets);
        const x = offset[0];
        const y = offset[1];
        const z = offset[2];
        for (let i = 0; i &lt; lenOffsets; i += 3) {
            tempArray[i + 0] = x;
            tempArray[i + 1] = y;
            tempArray[i + 2] = z;
        }
        if (this._state.offsetsBuf) {
            this._state.offsetsBuf.setData(tempArray, firstOffset, lenOffsets);
        }
        if (this.model.scene.readableGeometryEnabled) {
            portion.offset[0] = offset[0];
            portion.offset[1] = offset[1];
            portion.offset[2] = offset[2];
        }
    }

    getEachVertex(portionId, callback) {
        if (!this.model.scene.readableGeometryEnabled) {
            return;
        }
        const state = this._state;
        const portion = this._portions[portionId];
        if (!portion) {
            this.model.error(&quot;portion not found: &quot; + portionId);
            return;
        }
        const positions = portion.quantizedPositions;
        const sceneModelMatrix = this.model.matrix;
        const origin = math.vec4();
        origin.set(state.origin, 0);
        origin[3] = 1;
        math.mulMat4v4(sceneModelMatrix, origin, origin);
        const offsetX = origin[0];
        const offsetY = origin[1];
        const offsetZ = origin[2];
        const worldPos = tempVec4a;
        const positionsDecodeMatrix = state.positionsDecodeMatrix;
        for (let i = 0, len = positions.length; i &lt; len; i += 3) {
            worldPos[0] = positions[i];
            worldPos[1] = positions[i + 1];
            worldPos[2] = positions[i + 2];
            worldPos[3] = 1.0;
            math.decompressPosition(worldPos, positionsDecodeMatrix);
            worldPos[3] = 1;
            math.mulMat4v4(sceneModelMatrix, worldPos, worldPos);
            worldPos[0] += offsetX;
            worldPos[1] += offsetY;
            worldPos[2] += offsetZ;
            callback(worldPos);
        }
    }

    getEachIndex(portionId, callback) {
        if (!this.model.scene.readableGeometryEnabled) {
            return;
        }
        const portion = this._portions[portionId];
        if (!portion) {
            this.model.error(&quot;portion not found: &quot; + portionId);
            return;
        }
        const indices = portion.indices;
        for (let i = 0, len = indices.length; i &lt; len; i++) {
            callback(indices[i]);
        }
    }

    getElementsCountAndOffset(portionId) {
        let count = null;
        let offset = null;
        const portion = this._portions[portionId];

        if (portion) {
            count = portion.numIndices;
            offset = portion.indicesBaseIndex;
        }

        return {count, offset}
    }

    // ---------------------- COLOR RENDERING -----------------------------------

    drawColorOpaque(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0 || this._numTransparentLayerPortions === this._numPortions || this._numXRayedLayerPortions === this._numPortions) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);
        const useAlphaCutoff = this._state.textureSet &amp;&amp; (typeof(this._state.textureSet.alphaCutoff) === &quot;number&quot;);
        if (frameCtx.withSAO &amp;&amp; this.model.saoEnabled) {
            if (frameCtx.pbrEnabled &amp;&amp; this.model.pbrEnabled &amp;&amp; this._state.pbrSupported) {
                if (this._renderers.pbrRendererWithSAO) {
                    this._renderers.pbrRendererWithSAO.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE);
                }
            } else if (frameCtx.colorTextureEnabled &amp;&amp; this.model.colorTextureEnabled &amp;&amp; this._state.colorTextureSupported) {
                if (useAlphaCutoff) {
                    if (this._renderers.colorTextureRendererWithSAOAlphaCutoff) {
                        this._renderers.colorTextureRendererWithSAOAlphaCutoff.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE);
                    }
                } else {
                    if (this._renderers.colorTextureRendererWithSAO) {
                        this._renderers.colorTextureRendererWithSAO.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE);
                    }
                }
            } else if (this._state.normalsBuf) {
                if (this._renderers.colorRendererWithSAO) {
                    this._renderers.colorRendererWithSAO.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE);
                }
            } else {
                if (this._renderers.flatColorRendererWithSAO) {
                    this._renderers.flatColorRendererWithSAO.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE);
                }
            }
        } else {
            if (frameCtx.pbrEnabled &amp;&amp; this.model.pbrEnabled &amp;&amp; this._state.pbrSupported) {
                if (this._renderers.pbrRenderer) {
                    this._renderers.pbrRenderer.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE);
                }
            } else if (frameCtx.colorTextureEnabled &amp;&amp; this.model.colorTextureEnabled &amp;&amp; this._state.colorTextureSupported) {
                if (useAlphaCutoff) {
                    if (this._renderers.colorTextureRendererAlphaCutoff) {
                        this._renderers.colorTextureRendererAlphaCutoff.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE);
                    }
                } else {
                    if (this._renderers.colorTextureRenderer) {
                        this._renderers.colorTextureRenderer.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE);
                    }
                }
            } else if (this._state.normalsBuf) {
                if (this._renderers.colorRenderer) {
                    this._renderers.colorRenderer.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE);
                }
            } else {
                if (this._renderers.flatColorRenderer) {
                    this._renderers.flatColorRenderer.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE);
                }
            }
        }
    }

    _updateBackfaceCull(renderFlags, frameCtx) {
        const backfaces = true; // See XCD-230
        if (frameCtx.backfaces !== backfaces) {
            const gl = frameCtx.gl;
            if (backfaces) {
                gl.disable(gl.CULL_FACE);
            } else {
                gl.enable(gl.CULL_FACE);
            }
            frameCtx.backfaces = backfaces;
        }
    }

    drawColorTransparent(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0 || this._numTransparentLayerPortions === 0 || this._numXRayedLayerPortions === this._numPortions) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);
        if (frameCtx.pbrEnabled &amp;&amp; this.model.pbrEnabled &amp;&amp; this._state.pbrSupported) {
            if (this._renderers.pbrRenderer) {
                this._renderers.pbrRenderer.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_TRANSPARENT);
            }
        } else if (frameCtx.colorTextureEnabled &amp;&amp; this.model.colorTextureEnabled &amp;&amp; this._state.colorTextureSupported) {
            const useAlphaCutoff = this._state.textureSet &amp;&amp; (typeof(this._state.textureSet.alphaCutoff) === &quot;number&quot;);
            if (useAlphaCutoff) {
                if (this._renderers.colorTextureRendererAlphaCutoff) {
                    this._renderers.colorTextureRendererAlphaCutoff.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_TRANSPARENT);
                }
            } else {
                if (this._renderers.colorTextureRenderer) {
                    this._renderers.colorTextureRenderer.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_TRANSPARENT);
                }
            }
        } else if (this._state.normalsBuf) {
            if (this._renderers.colorRenderer) {
                this._renderers.colorRenderer.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_TRANSPARENT);
            }
        } else {
            if (this._renderers.flatColorRenderer) {
                this._renderers.flatColorRenderer.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_TRANSPARENT);
            }
        }
    }

    // ---------------------- RENDERING SAO POST EFFECT TARGETS --------------

    drawDepth(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0 || this._numTransparentLayerPortions === this._numPortions || this._numXRayedLayerPortions === this._numPortions) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);
        if (this._renderers.depthRenderer) {
            this._renderers.depthRenderer.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE); // Assume whatever post-effect uses depth (eg SAO) does not apply to transparent objects
        }
    }

    drawNormals(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0 || this._numTransparentLayerPortions === this._numPortions || this._numXRayedLayerPortions === this._numPortions) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);
        if (this._renderers.normalsRenderer) {
            this._renderers.normalsRenderer.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE);  // Assume whatever post-effect uses normals (eg SAO) does not apply to transparent objects
        }
    }

    // ---------------------- SILHOUETTE RENDERING -----------------------------------

    drawSilhouetteXRayed(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0 || this._numXRayedLayerPortions === 0) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);
        if (this._renderers.silhouetteRenderer) {
            this._renderers.silhouetteRenderer.drawLayer(frameCtx, this, RENDER_PASSES.SILHOUETTE_XRAYED);
        }
    }

    drawSilhouetteHighlighted(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0 || this._numHighlightedLayerPortions === 0) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);
        if (this._renderers.silhouetteRenderer) {
            this._renderers.silhouetteRenderer.drawLayer(frameCtx, this, RENDER_PASSES.SILHOUETTE_HIGHLIGHTED);
        }
    }

    drawSilhouetteSelected(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0 || this._numSelectedLayerPortions === 0) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);
        if (this._renderers.silhouetteRenderer) {
            this._renderers.silhouetteRenderer.drawLayer(frameCtx, this, RENDER_PASSES.SILHOUETTE_SELECTED);
        }
    }

    // ---------------------- EDGES RENDERING -----------------------------------

    drawEdgesColorOpaque(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0 || this._numEdgesLayerPortions === 0) {
            return;
        }
        if (this._renderers.edgesColorRenderer) {
            this._renderers.edgesColorRenderer.drawLayer(frameCtx, this, RENDER_PASSES.EDGES_COLOR_OPAQUE);
        }
    }

    drawEdgesColorTransparent(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0 || this._numEdgesLayerPortions === 0 || this._numTransparentLayerPortions === 0) {
            return;
        }
        if (this._renderers.edgesColorRenderer) {
            this._renderers.edgesColorRenderer.drawLayer(frameCtx, this, RENDER_PASSES.EDGES_COLOR_TRANSPARENT);
        }
    }

    drawEdgesHighlighted(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0 || this._numHighlightedLayerPortions === 0) {
            return;
        }
        if (this._renderers.edgesRenderer) {
            this._renderers.edgesRenderer.drawLayer(frameCtx, this, RENDER_PASSES.EDGES_HIGHLIGHTED);
        }
    }

    drawEdgesSelected(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0 || this._numSelectedLayerPortions === 0) {
            return;
        }
        if (this._renderers.edgesRenderer) {
            this._renderers.edgesRenderer.drawLayer(frameCtx, this, RENDER_PASSES.EDGES_SELECTED);
        }
    }

    drawEdgesXRayed(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0 || this._numXRayedLayerPortions === 0) {
            return;
        }
        if (this._renderers.edgesRenderer) {
            this._renderers.edgesRenderer.drawLayer(frameCtx, this, RENDER_PASSES.EDGES_XRAYED);
        }
    }

    // ---------------------- OCCLUSION CULL RENDERING -----------------------------------

    drawOcclusion(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);
        if (this._renderers.occlusionRenderer) {
            this._renderers.occlusionRenderer.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE);
        }
    }

    // ---------------------- SHADOW BUFFER RENDERING -----------------------------------

    drawShadow(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);
        if (this._renderers.shadowRenderer) {
            this._renderers.shadowRenderer.drawLayer(frameCtx, this, RENDER_PASSES.COLOR_OPAQUE);
        }
    }

    //---- PICKING ----------------------------------------------------------------------------------------------------

    drawPickMesh(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);
        if (this._renderers.pickMeshRenderer) {
            this._renderers.pickMeshRenderer.drawLayer(frameCtx, this, RENDER_PASSES.PICK);
        }
    }

    drawPickDepths(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);
        if (this._renderers.pickDepthRenderer) {
            this._renderers.pickDepthRenderer.drawLayer(frameCtx, this, RENDER_PASSES.PICK);
        }
    }

    drawPickNormals(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);

        ////////////////////////////////////////////////////////////////////////////////////////////////////
        // TODO
        // if (this._state.normalsBuf) {
        //     if (this._renderers.pickNormalsRenderer) {
        //         this._renderers.pickNormalsRenderer.drawLayer(frameCtx, this, RENDER_PASSES.PICK);
        //     }
        ////////////////////////////////////////////////////////////////////////////////////////////////////
        // } else {
        if (this._renderers.pickNormalsFlatRenderer) {
            this._renderers.pickNormalsFlatRenderer.drawLayer(frameCtx, this, RENDER_PASSES.PICK);
        }
        // }
    }

    drawSnapInit(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);
        if (this._renderers.snapInitRenderer) {
            this._renderers.snapInitRenderer.drawLayer(frameCtx, this, RENDER_PASSES.PICK);
        }
    }

    drawSnap(renderFlags, frameCtx) {
        if (this._numCulledLayerPortions === this._numPortions || this._numVisibleLayerPortions === 0) {
            return;
        }
        this._updateBackfaceCull(renderFlags, frameCtx);
        if (this._renderers.snapRenderer) {
            this._renderers.snapRenderer.drawLayer(frameCtx, this, RENDER_PASSES.PICK);
        }
    }

    //------------------------------------------------------------------------------------------------

    precisionRayPickSurface(portionId, worldRayOrigin, worldRayDir, worldSurfacePos, worldNormal) {

        if (!this.model.scene.readableGeometryEnabled) {
            return false;
        }

        const state = this._state;
        const portion = this._portions[portionId];

        if (!portion) {
            this.model.error(&quot;portion not found: &quot; + portionId);
            return false;
        }

        const positions = portion.quantizedPositions;
        const indices = portion.indices;
        const origin = state.origin;
        const offset = portion.offset;

        const rtcRayOrigin = tempVec3a;
        const rtcRayDir = tempVec3b;

        rtcRayOrigin.set(origin ? math.subVec3(worldRayOrigin, origin, tempVec3c) : worldRayOrigin);  // World -&gt; RTC
        rtcRayDir.set(worldRayDir);

        if (offset) {
            math.subVec3(rtcRayOrigin, offset);
        }

        math.transformRay(this.model.worldNormalMatrix, rtcRayOrigin, rtcRayDir, rtcRayOrigin, rtcRayDir); // RTC -&gt; local

        const a = tempVec3d;
        const b = tempVec3e;
        const c = tempVec3f;

        let gotIntersect = false;
        let closestDist = 0;
        const closestIntersectPos = tempVec3g;

        for (let i = 0, len = indices.length; i &lt; len; i += 3) {

            const ia = indices[i] * 3;
            const ib = indices[i + 1] * 3;
            const ic = indices[i + 2] * 3;

            a[0] = positions[ia];
            a[1] = positions[ia + 1];
            a[2] = positions[ia + 2];

            b[0] = positions[ib];
            b[1] = positions[ib + 1];
            b[2] = positions[ib + 2];

            c[0] = positions[ic];
            c[1] = positions[ic + 1];
            c[2] = positions[ic + 2];

            math.decompressPosition(a, state.positionsDecodeMatrix);
            math.decompressPosition(b, state.positionsDecodeMatrix);
            math.decompressPosition(c, state.positionsDecodeMatrix);

            if (math.rayTriangleIntersect(rtcRayOrigin, rtcRayDir, a, b, c, closestIntersectPos)) {

                math.transformPoint3(this.model.worldMatrix, closestIntersectPos, closestIntersectPos);

                if (offset) {
                    math.addVec3(closestIntersectPos, offset);
                }

                if (origin) {
                    math.addVec3(closestIntersectPos, origin);
                }

                const dist = Math.abs(math.lenVec3(math.subVec3(closestIntersectPos, worldRayOrigin, [])));

                if (!gotIntersect || dist &gt; closestDist) {
                    closestDist = dist;
                    worldSurfacePos.set(closestIntersectPos);
                    if (worldNormal) { // Not that wasteful to eagerly compute - unlikely to hit &gt;2 surfaces on most geometry
                        math.triangleNormal(a, b, c, worldNormal);
                    }
                    gotIntersect = true;
                }
            }
        }

        if (gotIntersect &amp;&amp; worldNormal) {
            math.transformVec3(this.model.worldNormalMatrix, worldNormal, worldNormal);
            math.normalizeVec3(worldNormal);
        }

        return gotIntersect;
    }

    // ---------

    destroy() {
        const state = this._state;
        if (state.positionsBuf) {
            state.positionsBuf.destroy();
            state.positionsBuf = null;
        }
        if (state.offsetsBuf) {
            state.offsetsBuf.destroy();
            state.offsetsBuf = null;
        }
        if (state.normalsBuf) {
            state.normalsBuf.destroy();
            state.normalsBuf = null;
        }
        if (state.colorsBuf) {
            state.colorsBuf.destroy();
            state.colorsBuf = null;
        }
        if (state.metallicRoughnessBuf) {
            state.metallicRoughnessBuf.destroy();
            state.metallicRoughnessBuf = null;
        }
        if (state.flagsBuf) {
            state.flagsBuf.destroy();
            state.flagsBuf = null;
        }
        if (state.pickColorsBuf) {
            state.pickColorsBuf.destroy();
            state.pickColorsBuf = null;
        }
        if (state.indicesBuf) {
            state.indicesBuf.destroy();
            state.indicessBuf = null;
        }
        if (state.edgeIndicesBuf) {
            state.edgeIndicesBuf.destroy();
            state.edgeIndicessBuf = null;
        }
        state.destroy();
    }
}


</code></pre>

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